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docs: Extend documentation on interactive restore with catalog shell. 

Signed-off-by: Christian Ebner <c.ebner@proxmox.com>
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Christian Ebner 2020-01-29 15:14:38 +01:00 committed by Dietmar Maurer
parent d58de5db19
commit 3f0983b7a3
1 changed files with 53 additions and 1 deletions
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docs/administration-guide.rst
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@ -375,7 +375,59 @@ to use the interactive recovery shell.
bin boot dev etc home lib lib32
...
.. todo:: Explain interactive restore
The interactive recovery shell is a minimalistic command line interface that
utilizes the metadata stored in the catalog for you to quickly list, navigate and
search files contained within a file archive.
You can select individual files as well as select files matched by a glob pattern
for restore.
The use of the catalog for navigation reduces the overhead otherwise caused by
network traffic and decryption, as instead of downloading and decrypting
individual encrypted chunks from the chunk store to access the metadata, we only
need to download and decrypt the catalog.
The actual chunks are only accessed if the metadata in the catalog is not enough
or for the actual restore.
Similar to common UNIX shells ``cd`` and ``ls`` are the commands used to change
working directory and list directory contents of the archive.
``pwd`` shows the full path of the current working directory with respect to the
archive root.
Being able to quickly search the contents of the archive is a often needed feature.
That's where the catalog is most valuable.
For example:
.. code-block:: console
pxar:/ > find etc/ **/*.txt --select
"/etc/X11/rgb.txt"
pxar:/ > list-selected
etc/**/*.txt
pxar:/ > restore-selected /target/path
...
This will find and print all files ending in ``.txt`` located in ``etc/`` or a
subdirectory and add the corresponding pattern to the list for subsequent restores.
``list-selected`` shows these patterns and ``restore-selected`` finally restores
all files in the archive matching the patterns to ``/target/path`` on the local
host. This will scan the whole archive.
With ``restore /target/path`` you can restore the sub-archive given by the current
working directory to the local target path ``/target/path`` on your host.
By additionally passing a glob pattern with ``--pattern <glob>``, the restore is
further limited to files matching the pattern.
For example:
.. code-block:: console
pxar:/ > cd /etc/
pxar:/etc/ > restore /target/ --pattern **/*.conf
...
The above will scan trough all the directories below ``/etc`` and restore all
files ending in ``.conf``.
.. todo:: Explain interactive restore in more detail
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